fix: `JsonBone` validate `object` and `list` too

[ArneGudermann]

This PR fix the Bug that only str is validated by the JsonBone.

Example :

testjson = JsonBone(schema={
        "type": "object",
        "properties": {
            "price": {"type": "number"},
            "name": {"type": "string"},
        },
    })

print(skel.setBoneValue("testjson",{"name" : "Eggs", "price" : "invalid"}))
print(skel["testjson"])

True
{'name': 'Eggs', 'price': 'invalid'}

---

print(skel.setBoneValue("testjson",json.dumps({"name" : "Eggs", "price" : "invalid"})))
print(skel["testjson"])

False
{'name': 'Eggs', 'price': 1}